CVE-2021-44419 : Exploit Details and Defense Strategies

A denial of service vulnerability exists in the cgiserver.cgi JSON command parser functionality of reolink RLC-410W v3.0.0.136_20121102. This vulnerability could allow an attacker to trigger a reboot via a specially-crafted HTTP request.

Understanding CVE-2021-44419

This CVE involves a denial of service vulnerability in the cgiserver.cgi JSON command parser of a specific Reolink camera model.

What is CVE-2021-44419?

The vulnerability in the JSON command parser of the affected Reolink camera model can be exploited through a specially-crafted HTTP request, resulting in a denial of service condition that triggers a system reboot.

The Impact of CVE-2021-44419

The impact of this vulnerability is rated as high severity with a CVSS base score of 8.6. It requires no privileges to exploit and can cause a significant availability impact.

Technical Details of CVE-2021-44419

This section provides a detailed breakdown of the technical aspects of the CVE.

Vulnerability Description

The vulnerability lies in the cgiserver.cgi JSON command parser of reolink RLC-410W v3.0.0.136_20121102, allowing an attacker to induce a system reboot through a specific HTTP request.

Affected Systems and Versions

Product: Not Applicable
Vendor: Not Applicable
Version: RLC-410W v3.0.0.136_20121102 (affected)

Exploitation Mechanism

Attack Complexity: Low
Attack Vector: Network
Privileges Required: None
User Interaction: None
Scope: Changed
Confidentiality Impact: None
Integrity Impact: None
Availability Impact: High

Mitigation and Prevention

Here are the recommended steps to mitigate and prevent exploitation of CVE-2021-44419:

Immediate Steps to Take

Monitor network traffic for any suspicious HTTP requests.
Implement proper input validation mechanisms.
Apply vendor-supplied patches or updates promptly.

Long-Term Security Practices

Regularly update firmware and software to patch known vulnerabilities.
Conduct security assessments and penetration testing to identify weaknesses.

Patching and Updates

Check for updates or security advisories from Reolink for the affected camera model.
Apply patches provided by the vendor to fix the vulnerability.